Lumen rating Dr. LED "Sidekick" LED bulb E26 base - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
 Not a Member? 


Like Tree1Likes
  • 1 Post By ebs001
Reply
 
LinkBack Thread Tools
  #1  
Old 07-03-2012
erps's Avatar
the pointy end is the bow
 
Join Date: Aug 2006
Location: La Conner, Washington
Posts: 6,112
Thanks: 2
Thanked 22 Times in 22 Posts
Rep Power: 9
erps will become famous soon enough erps will become famous soon enough
Lumen rating Dr. LED "Sidekick" LED bulb E26 base

So about half of my fixtures use a standard E-26 household type bulb. A few years ago, I changed them all out to CFL's, "looks funny/saves money" to save energy. They still draw 1.5 amps each, they're not as bright as I'd like and they take a while to warm up.

So now I'm looking at a Dr. LED bulb for the same fixtures. They're a 3 watt bulb and they say they're equivalent to a 60 watt bulb. So the lumen rating for a 60 watt bulb is around 800 lumens. The lumen rating for this bulb is 160. How can they claim it's a 60 watt equivalent when the lumens are less than 25% the lumen rating of an equivalent bulb? Is there something funny about lumens for LED bulbs? Anyone use one of these bulbs?

Dr. LED's Edison Screw Base LED Bulbs
__________________
Ray
S.V. Nikko
1983 Fraser 41
La Conner, WA


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Boating for over 25 years, some of them successfully.
Reply With Quote Share with Facebook
  #2  
Old 07-09-2012
ebs001's Avatar
Senior Member
 
Join Date: May 2006
Location: Ottawa, Canada
Posts: 2,101
Thanks: 4
Thanked 21 Times in 19 Posts
Rep Power: 9
ebs001 is on a distinguished road
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

I can't find anything to suggest that lumens are any different for LEDs. Wiki gives a generic LED a rating of 100 lumens per watt. So a 3W LED would produce 300 lumens. A 60W incendecent gives 660 lumens on their chart. They were doing a cost comparison and listed a 9W LED. I would say that Dr. LED is wrong in their figures. Maybe the name should be Miss LED.
Reply With Quote Share with Facebook
  #3  
Old 07-09-2012
Cruisingdad's Avatar
Best Looking MALE Mod
 
Join Date: Jul 2006
Location: Mobile Liveaboards
Posts: 9,894
Thanks: 3
Thanked 97 Times in 52 Posts
Rep Power: 10
Cruisingdad is a jewel in the rough Cruisingdad is a jewel in the rough Cruisingdad is a jewel in the rough
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

Hey Ray,

Maybe a totally different discussion and if off base, forgive me... but I converted (from Costco) to LEDs and CFL on 110v. Instead of using their 60w=60w equation, I converted up to a higher wattage and still save money. For example, lets say you have a 60w base. Instead of using their 60w replacement bulb, go up to 75 or 100w. You still save money and it really is a LOT brighter. You can also get the 110v stuff cheap at Costco. A simply inverter fixes 12v-110v issues and in the ned is probably cheaper.

Hope not too off base. Hope you are doing well too. ENjoying some nice weather I hope? It was 51 (high) when I left WA a month or so ago.

Brian
__________________
Sailnet Adminstrator & Moderator
Catalina 400 Technical Editor

2004 Catalina 400, Sea Mist IV (our boat, F/T Mobile Live Aboards in S FL and Keys primarily)
1987 Tayana Vancouver 42, Credendo Vides, (Mom and Pops boat, F/T Mobile Live Aboards in Puget Sound)

My Website:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Follow My Blog at:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Follow me on Facebook:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 07-09-2012
erps's Avatar
the pointy end is the bow
 
Join Date: Aug 2006
Location: La Conner, Washington
Posts: 6,112
Thanks: 2
Thanked 22 Times in 22 Posts
Rep Power: 9
erps will become famous soon enough erps will become famous soon enough
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

Brian, the sun came out last week. If this keeps up, I may have tan knees before the end of July! I'm going to hold off a little while longer on the LED bulb replacements. At $30 to almost $40 a bulb, it's more than I want to spend to experiment with. Our solar panels keep us in plenty of power for our current boat use anyway. Wish I knew you guys were in our neighborhood a couple of months ago. Both JRD22 and I showed Bilgewater around when he came through on a boat delivery a couple months ago.
__________________
Ray
S.V. Nikko
1983 Fraser 41
La Conner, WA


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Boating for over 25 years, some of them successfully.
Reply With Quote Share with Facebook
  #5  
Old 07-09-2012
Member
 
Join Date: Jun 2006
Location: Spokane Valley WA
Posts: 64
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
simpsoned is on a distinguished road
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

As a side note, have had bad luck with Dr LED for service on returns and have received some definitely "used" materials instead of new (like they just took someone elses return and sent it to me...ended up going with SuperbrightLEDs.com...had great service and prices were a lot lower. I am not sure about the lumen conversion, but I changes out my foremast light and spreader lights, plus all the interior ones and the boat is a lit brighter, plus I cut my power usage from 16.3 amps with all lights on to just over 6 amps with all lights on...
Ed Simpson
Newport 30 II #854
"I am the skipper...when my wife says so"
Reply With Quote Share with Facebook
  #6  
Old 07-09-2012
Cruisingdad's Avatar
Best Looking MALE Mod
 
Join Date: Jul 2006
Location: Mobile Liveaboards
Posts: 9,894
Thanks: 3
Thanked 97 Times in 52 Posts
Rep Power: 10
Cruisingdad is a jewel in the rough Cruisingdad is a jewel in the rough Cruisingdad is a jewel in the rough
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

Quote:
Originally Posted by erps View Post
Brian, the sun came out last week. If this keeps up, I may have tan knees before the end of July! I'm going to hold off a little while longer on the LED bulb replacements. At $30 to almost $40 a bulb, it's more than I want to spend to experiment with. Our solar panels keep us in plenty of power for our current boat use anyway. Wish I knew you guys were in our neighborhood a couple of months ago. Both JRD22 and I showed Bilgewater around when he came through on a boat delivery a couple months ago.
My dad is in Olympia now on his Tayana 42. He and I may sail her up to GIg Harbor next week. He is keeping his boat there and cruising your side of the world. Get-together would be great sometime.

Brian
__________________
Sailnet Adminstrator & Moderator
Catalina 400 Technical Editor

2004 Catalina 400, Sea Mist IV (our boat, F/T Mobile Live Aboards in S FL and Keys primarily)
1987 Tayana Vancouver 42, Credendo Vides, (Mom and Pops boat, F/T Mobile Live Aboards in Puget Sound)

My Website:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Follow My Blog at:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Follow me on Facebook:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #7  
Old 07-10-2012
JimsCAL's Avatar
Senior Member
 
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,343
Thanks: 0
Thanked 27 Times in 26 Posts
Rep Power: 8
JimsCAL is on a distinguished road
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

Looks like your CFLs are drawing 18 watts (1.5 amps at 12V) so they should be roughly equivalent to a 60 watt incandescent bulb. An LED will be better, but not substantially. I note that Defender shows a Dr. LED bulb for an E26 fixture, but its 120VAC, not 12VDC. I switched most of my lights to Imtra replacement bulbs over the last three years, Tried a couple, was happy, then switched the rest. But they are bayonnet sockets, not the large screw base.
Reply With Quote Share with Facebook
  #8  
Old 07-10-2012
hellosailor's Avatar
Plausible Deniability
 
Join Date: Apr 2006
Posts: 10,380
Thanks: 1
Thanked 72 Times in 70 Posts
Rep Power: 10
hellosailor has a spectacular aura about hellosailor has a spectacular aura about
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

erps, as i understand it the problem is "let's confuse the customer with numbers".

Or was it the old Devo lyric, "he baffled me with science" ?

OK, if I've screwed this up someone please correct it.

Lumens reflect the brightness from a specific area. If you picture a shining white ball, a miniature sun hanging in the middle of your cabin, the light coming out of it can be measured in candela, or lumens, among other ways. Now draw a little circle or square on the surface of that sun. Measure the light coming out of that little circle. That's your lumens. Step back a few yards, hold up an incident light meter, see how much light is falling on it, and you've got candela. One is the emitted light from a specific spot, the other is the light falling on something away from the whole bulb. Under certain conditions, yes, the two will be the same. Or at least, have a linear relation. At other times, not.

Drop a towel over the back side of the sun, and your cabin now gets way dimmer. But wait, if you meaure that circle you drew again, the lumens haven't changed. Somehow, the lumens haven't changed but the sun got dimmer! And the candlepower measurement will be lower.

And there's your discrepancy, the traditional tungsten bulb puts out light in a 360-degree x/y/z axis, a whole ball of light that bounces around, some wasted, some not. The LED replacement for it often has light that is only directed to a half-sphere "down" or "out" from the bulb. If the bulb is installed in a directional application, that may be a good thing, kind of like using a reflector spotlight to get more "brightness" from the same wattage.

If you were planning to hang it on a bare wire in mid-air, not so good, because half the light isn't there.

A lot of folks are spending a lot of R&D money on LED replacements for household bulbs. I don't think they're anywhere near ready yet. Still a LOT of bucks, with a limited light pattern, from what I've seen.

BTW, this is why the COLREGS get way more clever than we give them credit for, by simply asking "Can you see it from xx miles away? over these many degrees?"
Reply With Quote Share with Facebook
  #9  
Old 07-10-2012
ebs001's Avatar
Senior Member
 
Join Date: May 2006
Location: Ottawa, Canada
Posts: 2,101
Thanks: 4
Thanked 21 Times in 19 Posts
Rep Power: 9
ebs001 is on a distinguished road
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

Here's a price comparison of various light sources. I cannot get it as a chart so read it top to bottom under each heading ie incandescent/$2(19)/60/660/11etc

Cost Comparison




Incandescent

Halogen

Fluorescent

LED (Generic)

LED (Philips)

LED (Philips L-Prize)



Purchase price

$2[19]

$4[20]

$4[21]

$20[18]

$25[22]

$50[23]



Electricity usage

60 W

42 W

13 W

9 W

12.5 W

10 W



Lumens

660

570

660[24]

900

800

940



Lumens/Watt

11

13.6

50.8

100

64

94



Color Temperature Kelvin

2700

3100[25]

2700

3000

2700

2700



CRI

100

100

82

>75[26]

85

92



Lifespan (hours)

2,000

3,500

8,000

25,000

25,000

30,000



Bulb cost over 10 years – @6hours/day

$21.90

$25.03

$10.95

$17.52

$21.90

$36.50



Energy cost over 10 years – @15cents/kWhr

$197.10

$137.97

$42.71

$29.57

$41.06

$32.85



Total

$219.00

$163.00

$53.66

$47.09

$62.96

$69.35



Comparison based on 6 hours use per day (21,900 hours over 10 yrs)
erps likes this.

Last edited by ebs001; 07-10-2012 at 08:10 PM.
Reply With Quote Share with Facebook
  #10  
Old 07-31-2012
Trekka's Avatar
Seasoned Salt
 
Join Date: Jul 2006
Location: Northern Chesapeake Bay
Posts: 201
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Trekka is on a distinguished road
Re: Lumen rating Dr. LED "Sidekick" LED bulb E26 base

I have 4 of the edison base lamps with clap on shades in my boat. I switched from the screw in tungstn to CFL's even tho that made mounting shades more difficult. After buying a couple at marine stores I found I could order them online from RV companies at half the cost, and with a variety of wattage and color temperatures. The cheaper RV CFL's were sensitive to polarity, and I wound up wire swapping on 3 of the bases. These 12v CFL's worked great, cutting power usage down by at least half while staying bright. A significant reduction but more was desired.

I have tried 2 different 12v LED Globe lamps with the edison screw base. Both have been expensive $30+ , had poor color temperatures (what I call jaundice lighting), and were dim. No way in hell they matched the claimed brightness of 40 or 60 watt bulbs.

My advice, buy where you can return.

There are some very nice DR LED warm white clusters that are made for bayonet bases. If the company mounted one on a screw base and stuck a globe over it would make a very fine lamp for the need.
Reply With Quote Share with Facebook
Reply

Tags
cree led 8001351 , dr. led , led bulbs , lumens


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
"Seacock" vs. "ballcock" or "ball valve?" SEMIJim Gear & Maintenance 18 09-02-2013 05:31 PM
Seacock Base for 1/2" thru-hull "pipe" DrB Gear & Maintenance 2 12-08-2008 01:28 PM
C270 Main Sail "stack Pack", Quick Cover", "lazy Bag" Install randy22556 Catalina 1 02-28-2007 11:53 AM


All times are GMT -4. The time now is 10:48 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012